在选择培训方法时，知识的传授多以（）方法为主。
A.课堂授课
B.示范模拟
C.角色扮演
D.情景模拟
参考答案：A
用所给词的适当形式填空。
1. —Where is ______ (Tony) bike?
—It's under the tree.
2. There are two ______ (photo) on the wall.
3. He can ______ (sing) English songs well.
4. My father and mother are my ______ (parent).
5. This is my new friend. ______ (she) name is Lily.
轴系对中不良引起的振动特点和原因是什么？
